UNIO. 



27 



L 



Unio ventricosus. Say. 

 Unio lenis (junior). Con. 

 Unio cardium. Con. 



*lineatus. Lea. Chenu. 



*dolabrseformis. Lea. Chenu. 



*capax. : Q-reen. Con. Kiist. 



Sym. globosa. Lea, Trans. Am. P. S. 



*splendidus. Lea. 



*ochraceus. Say. Con. Could. Lins- 



ley. Dekay. Migh. Potter. 



Sym. ochracea. Lea. Trans. Am. 

 P. S. 



Unio rosaceus. Con. 



Lampsilis ochracea. Stimpson. (Agass. 

 MSS.) 



stagnalis. Con. 

 Unio Ogecheensis. Con. 



*Clarkianus. Lea. 



*crocatus. Lea. Chenu. 



*affinis. Lea. 



*cariosus. Say. Bar. Could. Lins- 



ley. Dekay. Potier. 

 Unio cariosa. 2 Lam. 

 Unio ovata. Valen. 

 Unio luteola. Con. ; not of Lam. 

 Unio oratus. Con. 

 Lampsilis cariosa. Stimpson. (Agass. 



MSS.) 



*Georgianus. Lea. Chenu. 

 perovatus. Con. 



OVAL. 



*altilis. Con. 



*multiradiatus. Lea. Desh. Chenu. 

 Unio fasciola ? Raf. 

 Unio fasciolus. Con. Kilst. 

 Unio ligamentina. Desh. 



*Novi-Eboraci. Lea. Dekay. Chenu. 



saxeus. Con. 

 *perovalis. Con. 

 *capssefoi'mis. Lea. Con. 



Greenii. Con. 



*pictus. Lea. 



*pallescens. Lea. 



*Tennesseensis. Lea. Chenu. 



^simplex. Lea. 



*flavescens. Lea. 



*interruptus. Lea. Chenu. 

 Unio tseniatus? Con. 

 Unio latiradiatus. Con. 



*Menkianus. Lea. Chenu. 



*Stonensis. Lea. 



*venustus. Lea. Chenu. 



*exiguus. Lea. Chenu. 



Tecomatensis. Lea. Chenu. 



1 Mr. Say considers capax as a variety of cardium, Raf, of ventricosus, Bar., of occidens, Lea, and subovatus, 

 Lea, while Mr. Conrad considers it as occidens, Lea. Capax is a perfectly distinct species, and I had considered it 

 so for some years before either Dr. Green or I described it. He preceded me a short time, of which I was not 

 aware, as it was published in an unusual periodical for such matter. 



3 U. cariosa, Lam. (Var. 2), is the Alas, marginata, Say. 



